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Titanium species in titanium silicalite TS-1 prepared by hydrothermal method; Titanium species in titanium silicalite TS-1 prepared by hydrothermal method
Li, G; Wang, XS; Guo, XW; Liu, S; Zhao, Q; Bao, XH; Lin, LW
KeywordTitanium Silicalite Titanium Silicalite Ts-1 Zeolite Ts-1 Zeolite Titanium Species Titanium Species Uv-vis Spectra Uv-vis Spectra Esr Esr
Source PublicationMATERIALS CHEMISTRY AND PHYSICS ; MATERIALS CHEMISTRY AND PHYSICS
2001-08-15 ; 2001-08-15
Volume71Issue:2Pages:195-201
Indexed BySCI ; SCI
SubtypeArticle ; Article
Department5028 ; 5028
Funding Project502 ; 502
WOS HeadingsScience & Technology ; Science & Technology ; Technology ; Technology
WOS SubjectMaterials Science, Multidisciplinary ; Materials Science, Multidisciplinary
WOS Research AreaMaterials Science ; Materials Science
WOS KeywordELECTRON-SPIN-RESONANCE ; ELECTRON-SPIN-RESONANCE ; CATALYTIC PROPERTIES ; CATALYTIC PROPERTIES ; ISOMORPHOUS SUBSTITUTION ; ISOMORPHOUS SUBSTITUTION
AbstractThe titanium species existing in titanium silicalite TS-1, which is prepared by hydrothermal method, were investigated using chemical analysis, XRD, FT-IR, Si-29 MAS NMR, UV-VIS, ESR. It has been observed that several kinds of titanium species may exist in titanium silicalite. The form that titanium atoms incorporate into the framework of titanium silicalite synthesized using tetrapropylammonium bromide (TPABr) as template differs from that using the classical method. But, the symmetry of titanium silicalite, changes from monoclinic to orthorhombic with the increase of titanium content in both methods. The Ti-O-2(-) originated from framework titanium and H2O2 has the moderate stability and may be active site in oxidation reaction. TS-1 synthesized using TPABr as template does not contain anatase, but contains a kind of partly condensed titanium species with six-fold coordination. The titanium species may correspond to 270-280 mn band in UV-VIS spectra and also can form Ti-O-2(-). But, this kind of Ti-O-2(-) is very stable and cannot be catalytic active site. So, the six-fold coordination titanium species may be inactive in both the oxidation reaction and the decomposition of H2O2. The hypothesis has been further proved by the phenomena that the titanium species is easily washed off using acid, and acid treating will not influence the catalytic performance of TS-1. (C) 2001 Elsevier Science B.V. All rights reserved.; The titanium species existing in titanium silicalite TS-1, which is prepared by hydrothermal method, were investigated using chemical analysis, XRD, FT-IR, Si-29 MAS NMR, UV-VIS, ESR. It has been observed that several kinds of titanium species may exist in titanium silicalite. The form that titanium atoms incorporate into the framework of titanium silicalite synthesized using tetrapropylammonium bromide (TPABr) as template differs from that using the classical method. But, the symmetry of titanium silicalite, changes from monoclinic to orthorhombic with the increase of titanium content in both methods. The Ti-O-2(-) originated from framework titanium and H2O2 has the moderate stability and may be active site in oxidation reaction. TS-1 synthesized using TPABr as template does not contain anatase, but contains a kind of partly condensed titanium species with six-fold coordination. The titanium species may correspond to 270-280 mn band in UV-VIS spectra and also can form Ti-O-2(-). But, this kind of Ti-O-2(-) is very stable and cannot be catalytic active site. So, the six-fold coordination titanium species may be inactive in both the oxidation reaction and the decomposition of H2O2. The hypothesis has been further proved by the phenomena that the titanium species is easily washed off using acid, and acid treating will not influence the catalytic performance of TS-1. (C) 2001 Elsevier Science B.V. All rights reserved.
Language英语 ; 英语
URL查看原文 ; 查看原文
WOS IDWOS:000170475200013 ; WOS:000170475200013
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/92051
Collection中国科学院大连化学物理研究所
Affiliation1.Dalian Univ Technol, Lab Comprehens Utilizat Carbonaceous Resources, Dalian 116012, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Li, G,Wang, XS,Guo, XW,et al. Titanium species in titanium silicalite TS-1 prepared by hydrothermal method, Titanium species in titanium silicalite TS-1 prepared by hydrothermal method[J]. MATERIALS CHEMISTRY AND PHYSICS, MATERIALS CHEMISTRY AND PHYSICS,2001, 2001,71, 71(2):195-201, 195-201.
APA Li, G.,Wang, XS.,Guo, XW.,Liu, S.,Zhao, Q.,...&Lin, LW.(2001).Titanium species in titanium silicalite TS-1 prepared by hydrothermal method.MATERIALS CHEMISTRY AND PHYSICS,71(2),195-201.
MLA Li, G,et al."Titanium species in titanium silicalite TS-1 prepared by hydrothermal method".MATERIALS CHEMISTRY AND PHYSICS 71.2(2001):195-201.
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